lower

v.1

c.1600, "to descend, sink," from lower (adj.), from Middle English lahghere (c.1200), comparative of low (adj.). Transitive meaning "to let down, to cause to descend" attested from 1650s. Related: Lowered; lowering. In the sense "to cause to descend" the simple verb low (Middle English lahghenn, c.1200) was in use into the 18c.